14B or D60? Bear in mind that there are two versions of the 14B - the 14B Semi-Floating, with a 9.5" ring; and the 14B Full-Floating, with a 10.5" ring.
The SF14B is on par with the D60, although there may be a bit more "performance aftermarket" support for the D60 (it was under MOPAR musclecars and, I believe, some other pax applications. The 14B was trucks only.) The D60 has a slightly larger ring than the SF14B - although I recall the SF14B having the "third pinion bearing" - or the pinion pilot like the Ford 9".
The FF14B is Hell-for-strong, and I'd probably shave and build one if I was building a silly rig - probably knuckle and otherwise modify a Ford 9" to complement it up front (it's been done, I've seen writeups on it.) If I didn't favour Dana axles so much, this would be the way to go.
I just plan on doing D44/D44 because A) I'm building a work truck, not a rock truck. I just need to be able to go anywhere and haul things. B) The D60 becomes overkill for what I'm doing - anything bigger than that just becomes money wasted for my application. Not to say you won't benefit from what you're planning - just that it won't do anything for me.
Ideally, I want to score a pair of D44s - a rear one around 62" wide, and a front HP around 62" (I don't know if one would be available.) That would give me a bit wider footprint than the OEM 60.5" - I could go a bit wider, but I don't want to get tangled up in flares - and I don't plan on running anything bigger than a 31"-33" tyre anyhow (my BFG 31's run me $90-100 as it is, I don't see any reason to spend more than that. Ouch!)